 |
| SCP1000/D11 test PCB carrier |
Barometric Pressure.
Parts required.
Barometric Pressure Sensor.
The barometric pressure sensor covers the range 300 - 1200 mb.
NOTE the SCP1000/D11 and I2C bus is 3.3v not 5v, so SCP1000/D11
and pullup resistors will need to be fed from a 3.3v supply.
SCP1000/D11 test PCB carrier pin number
1 Gnd
2 Gnd
3 Data ready output (not used)
4 Gnd
5 +3.3v
6 Gnd
7 Leave floating (not connected)
8 Gnd
9 Clock input SCL
10 Data input/output SDA
11 Not connected
12 +3.3v
13 +3.3v
14 Gnd
To calibrate;
Current Melbourne Observations
Adjust EEPROM address 7FF0 and 7FF1 (initial value B429 -342.9, 31m
elevation above sea level) to obtain correct barometric pressure.
MSB is the sign bit, providing a adjustment range of -799.9 to +799.9.
1013.25 mb = 14.696 psi = 760mm Hg = 29.92 in. Hg = 101.325 Kpa = 1 atm at sea level.
Atmospheric pressure at elevation
| Meters | mb |
|---|
| 0 | 1013 |
| 100 | 1000 |
| 150 | 994 |
| 200 | 988 |
| 300 | 976 |
| 400 | 964 |
| 450 | 956 |
| 600 | 939 |
| 750 | 923 |
| 900 | 906 |
| 1070 | 888 |
| 1220 | 871 |
| 1370 | 858 |
| 1520 | 842 |
| 1680 | 825 |
| 1830 | 811 |
| 1980 | 794 |
| 2130 | 781 |
| 2290 | 767 |
| 2440 | 750 |
| 2590 | 737 |
Alternatives.
MPX4115AP is a pressure sensor with
on-chip signal conditioning to provide an analog output signal that is
proportional to applied pressure.
SCX15ANC Sensym - 0 to 15 psi Absolute
MS5534 A calibrated digital alimeter /
barometer module.
SCP1000-D01 Absolute pressure sensor (SPI).
SMD500 Alimeter / barometer module.
HP03D Barometer module.
CSDX-Baro and HCA-Baro Barometric modules.
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